Yup, that header was designed for 1.5L Tercel engine.

I'm absolutely sure the tubes should be that long. Long tube headers are always superior to shorty headers. Look on any race car. The longer tubes give you a broader torque band than short tubes. I've read the recommendation for a street car to never go shorter than 32". I think this header is 34" or 36" IIRC. They're also equal length runners which is another good design practice.